Capacity Index : An indication of the capacity of an injection well to take water. It is usually measured in barrels per hour per pound increase in bottom-hole pressure. (SSWID)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}